linux-kernel - [PATCH v2 6/7] mm/migrate: remove unused function, fail_migrate

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Date:	Mon,  9 Dec 2013 18:10:47 +0900
From:	Joonsoo Kim <iamjoonsoo.kim@....com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Mel Gorman <mgorman@...e.de>, Rik van Riel <riel@...hat.com>,
	Rafael Aquini <aquini@...hat.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	Christoph Lameter <cl@...ux.com>,
	Joonsoo Kim <js1304@...il.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Vlastimil Babka <vbabka@...e.cz>,
	Zhang Yanfei <zhangyanfei@...fujitsu.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v2 6/7] mm/migrate: remove unused function, fail_migrate_page()

fail_migrate_page() isn't used anywhere, so remove it.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>

diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index e4671f9..4308018 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -41,9 +41,6 @@ extern int migrate_page(struct address_space *,
 extern int migrate_pages(struct list_head *l, new_page_t x,
 		unsigned long private, enum migrate_mode mode, int reason);
 
-extern int fail_migrate_page(struct address_space *,
-			struct page *, struct page *);
-
 extern int migrate_prep(void);
 extern int migrate_prep_local(void);
 extern int migrate_vmas(struct mm_struct *mm,
@@ -83,7 +80,6 @@ static inline int migrate_huge_page_move_mapping(struct address_space *mapping,
 
 /* Possible settings for the migrate_page() method in address_operations */
 #define migrate_page NULL
-#define fail_migrate_page NULL
 
 #endif /* CONFIG_MIGRATION */
 
diff --git a/mm/migrate.c b/mm/migrate.c
index cdafdc0..b595f89 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -550,14 +550,6 @@ void migrate_page_copy(struct page *newpage, struct page *page)
  *                    Migration functions
  ***********************************************************/
 
-/* Always fail migration. Used for mappings that are not movable */
-int fail_migrate_page(struct address_space *mapping,
-			struct page *newpage, struct page *page)
-{
-	return -EIO;
-}
-EXPORT_SYMBOL(fail_migrate_page);
-
 /*
  * Common logic to directly migrate a single page suitable for
  * pages that do not use PagePrivate/PagePrivate2.
-- 
1.7.9.5

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